Metal-welding machine.



No. a29;z9s. PATENTED AUG. 21, 1906.

1.. E6533. METAL WELDING MACHINE.

APPLIGATION FILED MAY 13,1905.

3 SHEETS-'SHEET 1.

No. 829,295. PATENTED AUG. 21, 1906. L. RGBHTIL METAL WELDING ma ma.

APPLIUATION FILED MAY 13, 1905 3 SHEETS-SHEET 2.

No. 329,295. PATBNTED AUG. 21, 1906.

METAL WELDING MACHINE ABPLIGATIOR FILED mu 13,1905.

3 SHBETSSHEBT 3.

,1 a M I -L/.

UNITED STATES PAgENTr LOUIS ROEHR, ()F STAMFORD, CONNECTICUT, ASSIGNORTO THE YALE TOWNE MANUFAC"UR1NG CQMPANY, OF STAMFORD, CONNEGTICUT.

METAL-WELDING MACHINE.

Specification of Letters Patent.

Patented Aug. 21, 1906.

To all when it may concern.-

Be it known that l, Louis ROICHR, of Stamford, in the county of lairlield and State of Connecticut, have invented certain new and usefulImprovements in Metal- W'clding Machines; and I do hereby declare thefollowing to be a full, clear, and exact description. of the invention,such as vill enable others skilled in the art to which it upper-- tainsto make and use the some.

My invention relates to an improvement in motel-welding machines andwhile it is dc signed particularly for use in connection with, electricwelding-machines for welding chain-links I would have it understood thatI do not limit the application of my improvement to chain-rnahingmachines nor to machines wherein thenecessery heat is pro duced byelectricity.

For the purposes of illustration I will, however, show and describe theimprovement in connection with a machine for Welding chainlinks.

In the o oration of the machines now in use for we ding chain links theassembled links in chain form are operated upon in succession as thechain is led through and the free cruise? the wire composing each linkfirmly welded, together. In the welding oporation the ends of the linkare engaged between two vise or clamping jaws, one of which is movable,and is held there until suf" ficiently heated for welding purposes.After it has been heated, or during the operation of heating, themovable clamp is forced toward the fixed clamp; thus forcing the twohighlyheated ends of the link together, which .causes the metal to bulgeout all around at the juncture, as shown in Figures 7 and 10, afterwhich the hammer by a. series of hlows (usuall 1 five, giv en in rapidsuccession) forgesor weds the joint and reduces the diameter of thebulged part to that of the wire compos ing the link, but leaves two finsroecting fi'om'the opposite sides of the wel derl joint, as shown inFigs. 8 and 11. After all the links of the chain have been thus weldedthe fins produced by the welding operation areremdved by a separate anddistinct operaing the operation of the hammer, thus causing the letterto smooth down by its succeeding stroke any projections or protuberancesformed by the preceding stroke.

My invention further consists in the parts and combination of parts andin details of construction, as will be more fully described, and pointedout in the claims.

In the accompanying drawings, Fig. 1 is a view in plan ofa welding-machne, showing my improvements thereon. Fig. 2 is a v ew in front elevationof s c. Fig. 3 is a view in elevation, the belt-w eel being removed andthe nfain sh aft shown in section. '1 Fig. 4 z

is a plan view of the cradle attachment withv a. chain-link in aposition to be welded. Fi 5 is aview in vertical section on line '1 1 ofig. 4. Fig. 6 is a stag cred cross-section on the line 2 2, Fig. 4. ig.7v shows in elevation and cross-section a rod or bar; and Fi 10 similarviews of a link, showing the ulge produced after the parts have beenheated and forced together. Fi 51.8 and 11 are similar views showing thewe d after hammering h the machine and method now in use. B igs. 9 and12 are corresponding views show ing the weld produced by my improvementFig. 13 is a sectional view showing theiineans for clutching thepulleytb the shaft, and Fig. 14 is a view showing the ratchet wheel andtsppet. 3, 1 a

Are resents the main bed late of an electric we ding-machine to. wcE-isfieeflred the rtll lfillght frame B, carrying main shaft C.

is shaft C is provided mu; a wheel C" hev 3 ing a series of teeth orratchets CF, whic latter are adapted to successivel engage the tappet Jon the hammer-alien J, thus ele-. voting the hemmershank and its hammerand permittin it 'to drop the downward movement of t e shank an itshammer being accelerated b the spring-J", located in the hou g B, w ichreceives the upper end i of the hammer-shank. In the operationiof themachine the shaft C makes one complete 1 5 r 9.9 stli revolution for oneweld. Hence din-kg this one revolution the hammer rises audio number oftimes con-es nding tosthe teeth;

or rate-hots O on they eel C. Y J the toatfier arafive teeth on the wheeC". Consequentlyifiv'qf n chines in use at the resent time blows will bestruck in rapid succession the hammer during the operational welding asingle link, and while these blows are being struck the link is heldclamps or vise-jaws. Consequently the blows all fall on one surface,which results in forcing the excess of metal out at the opposite sidesof the weld and between the anvil and hammer, thus roduoing the fins.(Shown in Figs. 8 and 11.

As before stated, the object of my invention is to produce the weld insuch a manner as to prevent the formation of fins, and th s Iaccomplishb mounting the clamp or visejaws in a me cradle, which latterrocks while the hammer is in operation, thus causing' any excess ofmetal which has been forced out between the anvil and hammer to beobliterated by the next succeeding blow of the hammer.

Secured to the base A is the carriage G. This carriage may be adjustedfor various sizes of links or wire, but remains fixed and immovableduring the operation of the machine. Slidingly mounted on the basedirectly opposite carriage G is the carriage G. This carriage as shownin Figs. 2, 4 and 6, is held a ainst displacement by the g1nde-platesstationary between .G' and is connected, as shown in Figs. 1, 2,

and 5, with the hand-lever G through the toggle-links G and G. With thisarrange- Inent it will be apparent that if the free end of lever G bemoved toward the machine, or to the left, the toggle-links G will movethe links G into alinement, thus forcin the carriage G toward thecarriage G. ach car-- riage G and G is provided with a bearin in whichare mounted the hubs g and g of the. sections H H of the cradle. Thiscradle, as

clearly shown in Fi 6, is formed in the are of a circle, with-its ubsconcentric with the circumference of the cradle, the tops of the carri'aes being concaved to conform to the cylindrical surfaces of the twosections of the cradle, thus forming solid and substantial, supports forthe latter at all times and under al conditions.

Secured within depressions in the upper surfaces of the cradle-sectionsH and H are the jaws I I, which may be of any suitable form. These iawsare rovidcd on their adiacent ends with shou dcrs i, on which the inkbeing welded rests. As will be seen, the jaw I i carried by the movablecarrier G'. Cons quently when the carrier is moved its jaw moves withit. The 'aws are constructed to receive and clamp t 0 rod or link to bewelded, and in the present instance I have slfown a link in position.This link when in osition rests with the axis of its member to ye weldedin line with the axis of the hubs g of the cradle, as clearly shown inFigs. 4 and 5, so that when the cradle is rocked the linkrocks on anaxis coincident with the axis of; the numbers to be welded. 'Io clamp alink in position, the section G of the carriage ismovcd in a directionaway from section (i. This movement. of section G separates the season ijaws I I',by which the link is held dur'ng the clamping operation,sutliciently to )ermit the link to drop therein. After the lin has beenplaced between the has and properly heated the section G of t e carriageis forced toward the section G, thus bringing the two heated ends of thelink into close contact, as shown in Fig. 10. During the weldingoperation which follows the clam ing operation above described the endsof the members to be welded rest on the anvil K, which, as shown, assesup through the base A and between t 1e carriages G and G andcradle-sections H and H and supports the link immediately below thehammer J. This anvil is vertically movable by a foot-lever or byautomatic means (not shown) and is only sulpposcd to be in its elevatedposition while t e ammer 18 working.

Secured on the hub g of cradle-section H is the crank-arm c, havingcrank-pin e, to which the pitman F is connected. This pitman is mountedat its upper end on a cam D, adjustably secured on the main shaft C.Hence when the shaft 0 is rotating a rocki movement will be imparted tothe section I of the cradle. This section H is provided with a tongueit, (see Fig. 2,) which latter rests in the slot h in cradle-section H,so that a rocking motion imparted to the section H will be transmittedto the section H by the tongue-and-slot connection h h, the atter alsopermitting of the free lon itudinal adjustment of the cradle-sectionll'.

Loosely mounted on the main shaft C is the pulley C, and slidinglymounted in the cylindrical drum D, carrying the eccentric D, is theclutchpin D, which latter is designed to enter a recess in the hub ofpulley (I and look the latter to the shaft C. The clutch-pin D isnormally held in engagement with the pulley by a spring d" and isprovided at its outer end with a head d which latter is designed toengage the beveled edqe of the upright member of the bell-crank lever X.TllS upright member of lever X normally rests in a peripheral groove inthe drum D, fixed to shaft C and in the path of the head 11 of theclutch-pin D and [S removed therefrom by a foot-treadlc, to which itshorizontal member is connected The pulley C is supposed to be constantlyrotating. Hence by actuating lever X on its fulcrum the vertical memberthorel'or will be withdrawn from the path of the head of clutch-pin,thus permitting the latter to engage the mlley and lock the latter tothe shalt. A to! the parts have been thus started the bell-crank lover Xshould be relnasml, thus permitting its vertical member of thebell-crank lever to fall into the path of the head of clutch-pin, thuswilululrnwmg the pin and disimnncctmg the inllcy and shaft at the comilotion of one ful revolution of the shalt. hiring this revolution ofthe shaft IIC the hammer J is actuated and the cradle rocked first inone direction and then in the opposite .direction back to its normalposition. This rocking of the cradle on an axis coincident with the axisof the two members of the rod or link being welded causes the link to beturned, thus presenting a new surface to the hammer and bringing anyline or enlargements produced by the revious blow 16 onto the anvil orunder the liannner, thus preventing the formation of the lins.

It is evident that many slight changes might be resorted to in therelative arrangement of arts herein shiawn and described withouteparting from the spirit and scope of my invention. Hence I would haveit understood that I do not wish to coniine myself to the exactconstruction shown and described; but,

20 Having fully describe my invention, what I claim as new, and desireJo secure by Letters Patent, is

1. The combination with an anvil and a hammer, of means, one on eachside of the :5 hammer and anvil, for holding one of the two parts to bewelded, mechanism for fore-in such holding moans toward each other, andmeans actuated simultaneously with the welding-hammer for turning theparts to be welded.

2. The combination with an anvil and a hammer, of means, one each sideof the hammer and anvil for holding one of the two parts to be welded,mechanism for forcing such 3 5 holding means toward each other and meansactuated simultaneously with the Welding hammer for rocking saio lmldingmeans.

3. The combination with an anvil and a hammer, of means, one on ach sideof the hammer and anvil for holding one of the two parts to be welded,mechanism for forcin such holdingmeans toward each other ant meansactuated simultaneously with the Welding-hammer for rocking the parts tobe 5 welded on their axis.

4. The combination with an anvil and a hammer, of a rocking cradle,means carried by said cradle, one on each side of thehammer and anvil,for holding the two parts to be 5o welded, mechanism for lorcing suchholding means toward each other, a drive-shaft, and means connecting thedrive-shaft and rocking cradle whereby they are actuated simultaneously.5. The combination with an anvil and a hammer, of a rocking cradle,means carried by the cradle, one on'each side of the hammer and anvilfor holding the two imrts to be incident with the axis of the cradle,inec anwelded, the axis of the parts so he d boin coism for forcin suchholding means toward each other, an means for rocking the cradle. n

6. The combination with a hammer and an anvil, of a sectional cradle,one section being fixed against 101,1 itudinal movement and the othermovable ongitudinally means connecting said sections whereby they arecaused to rock simultaneously and rocking means connected to one of saidcradle-sections.

7. The combination with a welding device, of means for holding the partsto be welded, the said holding means bein located on oposite sides ofthe welding evice, mechanism for forcing such holding means toward eachother whereby the parts to be welded are held end to end, and means forrocking the clamps during the welding operation.-

8. V The combination with welding devices, of a. two-part cradle, meanscarried by the latter for clamping the members to be welded, and meansactuated simultaneously with the weldln means for rocking the cradle.

9. Tlie combination with welding devices, of two carria cs one fixed andthe other movable, means or moving the latter one toward and away fromthe fixed carriage, a sectional cradle mounted in said carria es andmeans actuated simultaneously with the welding devices for roclrin thecradle.

10. The com ination with welding devices, of two carriages one fixed andthe other movable, means for moving the latter, a sectional cradlemounted in said carriages, holding means carried by said cradle-sectionsand means actuated simultaneously with the weldinr means for rocking thecradle.

ll. he combination with welding devices, of two carriages one fixed andthe other movable, a sectional cradle mounted to rock ioo on saidcarriages, holding means carried by said cradle-sections and meansactuated s1- niultancously with the welding means for rocking the cradlesccti0ns.

12. The combination with welding devices, of two' carriages one fixedand the other movable, means for moving the latter toward and from thefixed carriage, a sectional cradle mounted on said carriages, holdingmeans carried by tl'1ecradle-sect1ons,a shaft no for actuating thewcldin means and devices connecting said shaft and the cradle forrocking the latter. I

In testimony whereof I have signed this specification in the presence oftwo subscrib- I r 5 ing witnesses.

LOUIS ROEHR Witnesses:

Uri/ls. E. VAIL, FREDERICK A. WALDRON.

